| Locality 81 Lower Dev athyrid from the Tramo inferior, Asturias, NW Spain | Praguiense | Tramo inferior | Principado de Asturias |
| Locality 82A Lower Dev athyrid from the Tramo inferior, Leon, NW Spain | Praguiense | Tramo inferior | Castilla y León |
| Locality 82B Lower Dev assem from the upper La Vid Group, Leon, NW Spain | Emsiense superior | upper part | Castilla y León |
| Locality 83 Emsian athyrid from the upper La Vid Group, Leon, NW Spain | Emsiense superior | upper part | Castilla y León |
| Locality 84 Dev athyrid from the top Santa Lucia Fm, Leon, NW Spain | Emsiense superior | Santa Lucia | Castilla y León |
| Locality 85 Emsian asemblage from the upper La Vid Group, Leon, NW Spain | Emsiense superior | upper part | Castilla y León |
| Locality 86 Lower Dev athyrid from the Tramo inferior, Leon, NW Spain | Praguiense | Tramo inferior | Castilla y León |
| Locality 87 Lower Dev athyrid from the upper LaVId Group, Leon, NW Spain | Emsiense superior | upper part | Castilla y León |
| Locality 88 Emsian assemblage from the upper La Vid Group, Leon, NW Spain | Emsiense superior | upper part | Castilla y León |
| Locality 90 Upper Emsian fauna from the basal Santa Lucia Fm, Leon, NW Spain | Emsiense superior | Santa Lucia | Castilla y León |
| Locality 91 Devonian athyrids from the upper Santa Lucia Fm, Leon, NW Spain | Emsiense superior | Santa Lucia | Castilla y León |
| Locality 92 Devonian fauna from the upper Santa Lucia Fm, Leon, NW Spain | Emsiense superior | Santa Lucia | Castilla y León |
| Locality 93 Devonian athyrids from the upper Santa Lucia Fm, Leon, NW Spain | Emsiense superior | Santa Lucia | Castilla y León |
| Locality 94 Givetian athyrid from the basal Portilla Fm, Leon, NW Spain | Givetiense | Portilla | Castilla y León |
| Locality 95 Famennian athyrid from the Ermita Fm, Leon, NW Spain | Famenniense | Ermita | Castilla y León |
| Locality 96 Dev athyrid from the Portilla Fm, Leon, NW Spain | Givetiense superior | Portilla | Castilla y León |
| Locality 97 Emsian athyrids from the upper La Vid Gp, Leon, NW Spain | Emsiense superior | upper part | Castilla y León |
| Locality 98 Devonian assemblage from the upper Santa Lucia Fm, Leon, NW Spain | Emsiense superior | Santa Lucia | Castilla y León |
| Locality 99 Devonian assemblage from the upper Santa Lucia Fm, Leon, NW Spain | Emsiense superior | Santa Lucia | Castilla y León |
| Lochkovian assem #2 from Raneces Group Caliza de Nieva member Asturias, NW Spain | Lochkoviense | Caliza de Nieva | Principado de Asturias |
| Lochkovian assem #3 from Raneces Group Caliza de Nieva member Asturias, NW Spain | Lochkoviense | Caliza de Nieva | Principado de Asturias |
| Lochkovian assembl from Raneces Group Caliza de Nieva member Asturias, NW Spain | Lochkoviense | Caliza de Nieva | Principado de Asturias |
| Los Barrios de Luna, Mirantes de Luna, Leon, Santa Lucia Formation | Emsiense superior | Santa Lucia | — |
| Lower Dev assembl from Raneces Group Capas de Aguion Fm, North Oviedo, NW Spain | Emsiense superior | Capas de Aguion | Principado de Asturias |
| Lower Dev assembl from Raneces Group Capas de Aguion Fm, South Grullos, NW Spain | Emsiense superior | Capas de Aguion | Principado de Asturias |
| Lower Dev assembl from the Raneces Group Capas de Aguion Fm, Asturias, NW Spain | Emsiense superior | Capas de Aguion | Principado de Asturias |
| Lower Dev assemblage from Raneces Grp Caliza de Ferrones Fm, E. Grado, NW Spain | Emsiense | Capas de Ferrones | Principado de Asturias |
| Lower Dev athyrid from the Raneces Group Capas de Aguion Fm, Asturias, NW Spain | Emsiense superior | Capas de Aguion | Principado de Asturias |
| Lower Dev athyrid from the Raneces Grp Caliza de Ferrones Fm, Asturias, NW Spain | Praguiense | Capas de Ferrones | Principado de Asturias |
| Lower Devonian athyrid from Raneces Gp lower Caliza de Nieva Asturias, NW Spain | Lochkoviense | Caliza de Nieva | Principado de Asturias |
| Lower Devonian athyrid from the bottom La Vid Group Leon, NW Spain | Praguiense | basal part | Castilla y León |
| Lower Kellwasser Limestone, Segura-Huesa del Comun area, Aragon, Spain | Frasniense | Lower Kellwasser Limestone | Aragón |
| Mariposas Fmn, submember d4a-alpha, Nogueras area, Aragon, Spain | Praguiense | Mariposas | Aragón |
| Mariposas Fmn, submember d4a-beta, Nogueras area | Emsiense inferior | Mariposas | Aragón |
| Mariposas Fmn, submember d4a-gamma, Nogueras area, Aragon, Spain | Emsiense inferior | Mariposas | Aragón |
| Mariposas Fmn, submember d4b-alpha, Nogueras area, Aragon, Spain | Emsiense inferior | Mariposas | Aragón |
| Mariposas Fmn, submember d4b-beta (upper cephalopod Lst), Nogueras area, Aragon | Emsiense superior | Mariposas | Aragón |
| Mariposas Fmn, submember d4b-beta, Nogueras area, Aragon, Spain | Emsiense superior | Mariposas | Aragón |
| Mariposas Fmn, submember d4b-delta, Nogueras area, Aragon, Spain | Emsiense superior | Mariposas | Aragón |
| Mariposas Fmn, submember d4b-gamma, Nogueras area, Aragon, Spain | Emsiense superior | Mariposas | Aragón |
| Matallana (de Torio), MT | Givetiense | Portilla | Castilla y León |
| Maya de Baztan | Emsiense superior | Arizacun Ls | — |
| Mirantes de Luna | Givetiense | Portilla | Castilla y León |
| Molino Fmn, Cordillera Iberica Oriental | Emsiense superior | Molino | Aragón |
| Monforte Fmn, unit 1, Cordillera Iberica Oriental | Eifeliense | Monforte | Aragón |
| Monforte Fmn, unit 2, Cordillera Iberica Oriental | Eifeliense | Monforte | Aragón |
| Monforte Fmn, unit 4, Cordillera Iberica Oriental | Eifeliense | Monforte | Aragón |
| Monforte Fmn, unit 6, Cordillera Iberica Oriental | Eifeliense | Monforte | Aragón |
| Moniello - Mon-01 & 02 | Emsiense | Moniello | — |
| Moniello - Mon-12 | Emsiense | Moniello | — |
| Moniello - Mon-13 | Emsiense | Moniello | — |
| Moniello - Mon-14 | Emsiense | Moniello | — |
| Moniello, Arnao Section fenestrate bryozoan | Eifeliense | Moniello | — |
| Moniello, Moniello Formation, Lower Moniello Beds, Asturias | Emsiense superior | Moniello | — |
| Moyuela Fmn, lower third, Cordillera Iberica Oriental | Eifeliense | Moyuela | Aragón |
| Moyuela Fmn, middle third, Cordillera Iberica Oriental | Eifeliense | Moyuela | Aragón |
| Moyuela Fmn, upper third, Cordillera Iberica Oriental | Eifeliense | Moyuela | Aragón |
| Near Collada del Campo de la Puerta, La Vid Formation, Sample RGM 211 542 | Emsiense | Esla | — |
| Near village Villayandre, Marl Unit, Esla Fm, Sample GZG.IN.0.010.529 | Emsiense | Esla | — |
| Nogueras Fmn, submember d3a-beta | Praguiense | Nogueras | — |